was a Silurian
who served as the science
adviser to the Silurian Triad
: The Scales of Injustice
) He and Scibus
later travelled in a Silurian battlecruiser
with Icthar, the leader and sole-survivor of the Triad.
In 2084, Icthar attempted to take over Sea Base 4 and start a nuclear war to wipe out humanity, but were defeated by the Fifth Doctor. Tarpok later died from exposure to hexachromite gas. (TV: Warriors of the Deep)
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